Exercise device



FIG. 1 is a perspective view showing my design of exercise device;

FIG. 2 is a back view;

FIG. 3 is a bottom view;

FIG. 4 is a front view;

FIG. 5 is a left side view;

FIG. 6 is a right side view; and,

FIG. 7 is a top view of the design thereof. 

CLAIM The ornamental design for exercise device, as shown and described. 